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Free GNS3 Lab MPLS VPNs Using VRF

Posted by: admin  :  Category: GNS3 Dynamips, Lab Scenarios, Routing




MPLSVPN

This Free GNS3 lab is provided to help you gain a better understanding of MPLS and how to configure it in Cisco IOS based routers. We will also review configuration of BGP, OSPF, EIGRP, and RIP routing protocols and the redistribution of these protocols. The lab has been created using GNS3 and is based on an older lab with some changes to the MPLS backbone at the provider core.

What is MPLS:

Multiprotocol Label Switching (MPLS) allows Enterprises and Service Providers to construct next-generation intelligent networks that deliver a wide variety of advanced, value-added services over a single infrastructure. This economical solution can be integrated seamlessly over any existing infrastructure, such as IP, Frame Relay, ATM, or Ethernet. Subscribers with differing access links can be aggregated on an MPLS edge without changing their current environments, as MPLS is independent of access technologies.

Integration of MPLS application components, including Layer 3 VPNs, Layer 2 VPNs, Traffic Engineering, QoS, GMPLS, and IPV6 enable the development of highly efficient, scalable, and secure networks that guarantee Service Level Agreements.

MPLS-VPN:

MPLS Layer 3 VPNs use a peer-to-peer model that uses Border Gateway Protocol (BGP) to distribute VPN-related information. This highly scalable, peer-to-peer model allows enterprise subscribers to outsource routing information to service providers, resulting in significant cost savings and a reduction in operational complexity for enterprises. Service providers can then offer value-added services like Quality of Service (QoS) and Traffic Engineering, allowing network convergence that encompasses voice, video, and data.

IP-based VPNs use the next-generation Virtual Routing/Forwarding instance (VRF)-Lite, called Easy Virtual Network (EVN). This simplifies Layer 3 network virtualization and allows customers to easily provide traffic separation and path isolation on a shared network infrastructure, removing the need to deploy MPLS in the enterprise network. EVN is fully integrated with traditional MPLS-VPN or MPLS VPN on GRE.

VRF:

Virtual Routing and Forwarding (VRF), allows you to implement multiple routing tables on the same router. Each VRF is independent and could have the same IP subnets being forwarded to completely different destinations.

Learning Objectives:

  • Review basic router configuration.
  • Review basic routing protocol configuration (OSPF, EIGRP, RIP, and BGP).
  • Review basic MPLS configuration
  • Understand and configure MPLS-VRF.

 

Requirements:

Clients:

  • • All SeaTac, Renton, and Everett clients can access Bellevue and the Internet.
  • • BELLEVEUE is running OSPF process 1.
  • • BELLEVEUE has access to all clients except INTERNET.
  • • INTERNET is running OSPF process 4.
  • • INTERNET has access to all clients except BELLEVEUE
  • • SEATAC-HQ and SEATAC-BR is running OSPF process 2 and communicates over a dedicated connection between the sites.
  • • Communication between SeaTac and Renton or Everett is not permitted.
  • • Renton-HQ and BR are running RIP Version 2.
  • • Renton-HQ communicates with Renton-BR but not to SeaTac or Everett.
  • • Everett-HQ, BR1 and BR2 are running EIGRP 3 and are part of BGP AS 65300
  • • Everett-HQ communicates with Everett-BR1 and BR2.
  • • Everett-HQ can access Renton-HQ but not vice versa. Nor can Everett-BR1 and BR2 access Renton-HQ or BR.

MPLS:

  • The P1 and P2 provider routers are connected to the PE1 and PE2 provider edge routers as to provide redundancy in the provider core.
  • P1 and P2 provider routers are running in area 0 of OSPF process 1.
  • PE1 and PE2 provider routers are part of BGP AS-65100
  • PE1 and PE2 provider routers are running OSPF, EIGRP, RIP
  • PE1 and PE2 provider edge routers communicate with connected clients using multiple routing protocols.
  • PE1 and PE2 provider edge routers provide MPLS redistributes of clients routes. 

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